Faulty graphics card?

About a week ago I began to have graphics problems when playing any 3d game - the game would crash, on restart I'd get a warning and memory dump screen. The problem has gradually got worse to the extent that graphics even in 2d are sometimes corrupted, and I can't get 3d to work at all. I've tried various drivers, I've swapped memory and tried another PSU (from my sons PC) but the problem is still there. I've reseated the card and checked temps which are within normal levels. I've now reinstalled windows, which went without a hitch, installed m/b drivers, no problem, but as soon as I installed video driver, the PC immediately crashed.

I'm assuming the graphics card is faulty - what do you think?

I'm running nvidia 7600GT graphics, AMD64 3500 (socket 939), Asus A8V-VM m/b, 1 gig memory and XP Home. I'd be grateful for any comments before I splash out on a new graphics card.

Try reinstalling the latest DirectX from Microsoft or from one of your game disks. Alternatively you could try the Omega drivers, do a google search for them, they are basically tweaked Nvidia and ATI drivers for gamers.

Thanks for your help guys, only thing I can do now is order the graphics card and if it turns out that's not the problem I'll have to send it back. If it's not the graphics card it must be the m/b. I'll let you know in a few days.